Humidifier



FIG. 1 is a front perspective view of the humidifier showing the present design.

FIG. 2 is a front view thereof.

FIG. 3 is a rear view thereof.

FIG. 4 is a right view thereof.

FIG. 5 is a left view thereof.

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The portions of the design shown in broken lines being for the purpose of illustrating environment only and form no part of the claimed design. 

CLAIM The ornamental design for a humidifier, as shown and described. 